Regarding slider. it should work under any circumstances if setup correctly.

The only thing that I can think of that you are trying to use separate slider for each and every post on your blog. Unfortunately, it is not possible and there is only one main slider in the front page.

If you are looking for slider for each and every post you might want to look into WordPress plugin repository (http://wordpress.org/plugins/). There are dozens of plugins that does just that.